20020023231 has 16 divisors (see below), whose sum is σ = 29674014720. Its totient is φ = 11922593760.

The previous prime is 20020023197. The next prime is 20020023253. The reversal of 20020023231 is 13232002002.

It is not a de Polignac number, because 20020023231 - 2⁶ = 20020023167 is a prime.

It is a super-2 number, since 2×20020023231² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20020023231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20020023271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8278371 + ... + 8280788.

It is an arithmetic number, because the mean of its divisors is an integer number (1854625920).

Almost surely, 2^20020023231 is an apocalyptic number.

20020023231 is a deficient number, since it is larger than the sum of its proper divisors (9653991489).

20020023231 is a wasteful number, since it uses less digits than its factorization.

20020023231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16559206.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 20020023231 its reverse (13232002002), we get a palindrome (33252025233).

The spelling of 20020023231 in words is "twenty billion, twenty million, twenty-three thousand, two hundred thirty-one".